Evaporation of liquids giving off noxious gases.



1-. O. LUNDBERG.

EVAPORATION OF LIQUIDS GIVING OFF NOXIOUS GASES. APPLICATION FILED JULY31.1915.

1,198,245, PatenteIiSept. 12,1916.

Invencmr J. flLuno'IIj erg Atturney UNITED STATES PATENT OFFICE.

JACOB OTTO LUNDBERG, OF FLATEBY, NORWAY.

EVAPORATION OF LIQUIDS GIVING OFF NOXIOUS GASES.

Specification of Letters Patent.

Patented Sept. 12, 1916.

Application filed July 31, 1915. Serial No. 42,888.

To 117111410111. it may concern.

Be it known that I, J.\con ()T'IU Lonnnnao, civil engineer, citizen ofNorway, residing at Flateby, .Norway. have invented new and usefulImprovements in the llvapopor from such systems is obtained in anabsolutely pure state, since the vapor to be used outside theevaporating plant, consists not of the liquor to be concentrated. but oianother liquid, the -vapor of which has not noxious properties.

The accompanying drawing illustrates the method diagrammatically by wayof example.

I, 11 and III are evaporators of a wellknown construction consisting oftop chambers 1t, li 1i;, and chambers -7, r. 79,,- interconnectml bytubes and surrounded by a jacket to be heated by steam. The black liquoror other liquid to be evaporated is introduced into the container r, bya tube e from a pump. Then steam under high pressure is introducedthrough tube -A-, the liquid boils in the container -'r,, foams up andthe. vapor is driven through the tube B- into the jacket of the vessel-1 l. The liquid which is not evaporated passes by the tube ,(Z to thecontainer 1' of vessel II in order to be further evaporated. The steamintroduced at A is condensed and the condensation is conducted, inaccordance with an embodimentof my method, by the tube (z. .=to thecontainer 'r,, of the vessel III in order to be evaporated by theexhaust vapor coming by the tube C from the vessel -II.

The waste products from J) and c may be conducted to a place, whereliquid that is not quite pure, may be utilized, for instance forpreheating the liquor before it passes into the vessel -I-. From thetube l), however, pure steam of a lower pressure is obtained, such steambeing produced by the waste product of the same pure steam which wasconducted from the steam boiler to the vessel 1.

instead of using the products from the tube (1., the container 1' may besupplied with pure water or with another liquid,

the vapor of which has not noxious properties, if such a liquid bepresent.

As a specially suitable step should be mentioned, that the wasteproducts in the tube a may be conducted back and again pumped into thesteam boiler which produces the high pressure steam conducted to thetube A, while the container 7, can be supplied with the waste productsfrom for instance the drying portion of a paper making machine, to whichthe low pressure steam is conducted by the tube l)-. The invention canalso be utilized in other industries, especially the sugar industry.

Having now described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. "\"i'ethod ot' evaporating liquids giving ofi' malodorous or noxiousvapors, and conserving the heat contained in the vapors produced by thisevaporation, consisting in condensing the vapors produced and utilizingthe heat released by such condensation to produce vapors from anotherliquid, the vapors of which have not noxious properties, the said liquidbeing during its evaporation bodily separated from the vapors firstmentioned.

2. Method of e *aporating liquids giving off malodorous or noxiousvapors, and conserving the heat contained in the vapors produced by thise'aporation, consisting in evaporating the liquid in a plurality ofstages receiving as a heating medium the vapors from the preceding stageand as a liquid the non-evaporated part from the pre cedingstage, exceptthe first stage. which is supplied with steam as a heating medium andthe last stage which as a liquid receives the condensed steam from thefirst stage.

3. Method of evaporating liquids giving off malodorous or ,noxiousvapors, and conserving the hcat contained in the vapors produced by thisevaporation, consisting in evaporating the liquid in a plurality ofstages receiving as a heating medium the isor-S from the preceding stageand as a.

liquid the n0n-evaporated part from the preceding stage, except thefirst stage which is supplied with steam as a heating medium and thelast stage which as a liquid receives the condensed steam obtained byutilizing the heat of the vapors produced in the said last stages.

In testimony whereof I have signed my name to this specification in. thepresence of two subscribing witnesses.

JAOQB OTTO LUNDBERG. Witnesses:

AXEL LAHN, Moenns BUGGE.

